Interaction of carbon monoxide with Ru/γ-Al2O3. An electron spin resonance investigation
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 83 (12) , 3619-3626
- https://doi.org/10.1039/f19878303619
Abstract
Interaction of carbon monoxide with Ru/γ-Al2O3 leads to the formation of RuI and RuIII carbonyl derivatives. The relative amounts of the two species are a function of the temperature used in decarbonylating the Ru3(CO)12/γ-Al2O3 precursor. The thermal and vacuum stabilities of the RuI derivative [g⊥= 2.050, g‖= 1.992, A‖(99Ru, 101Ru)= 28 G] and the RuIII derivative (g‖= 2.046, g⊥= 2.005) are different, the RuIII species being the more stable. The Ru—CO bond strength of these carbonyls is high in comparison with that of the analogous Rh/γ-Al2O3 carbonyl derivatives. The enhanced bond strength may account for the difference in the catalytic behaviour between the Ru and Rh systems.Keywords
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